brineereoff



3 Shets-Sheefi 1. I

(No Model.)

W. M. BRINKERHOFF.

- HARROW.

@nted Nova, 6, 1888.

a Sheets-Sheet 2.

(No Model.)

' W. M. BRINKERHOFF.

HARROW.

Patent ed Nov. 6, 1888.

n. anus. mwum m. wimp. 1 a

' teethguards.

UNITED STATES PATENT Orr-Ion.

\VARREN M. BRINKERHOFF, OF AUBURN, NEW YORK.

HARROW.

SPECIFICATION forming part of Letters Patent No. 392,312, dated November 6. 1888.

Application filed July 31, 1888. Serial No. 281,493. (No molel.)

To all whom it may concern:

Be it known that I, WARREN M. BRINKER- HOFF, a citizen of the United States, residing at Auburn, in the county of Cayuga and State of New York,have invented certain new and useful Improvements in Harrows; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to the spring-tooth harrow, and more particularly to that class of harrows in which the frame is provided with These guards are mainly constructed in such manner that the teeth of the harrow have their points of attachment below the plane of the main portion of the frame. This is objectionable, as in some constructions a portion of the elastic part of the tooth is placed in such a position that it is subject to a great deal of wear from contact with the ground, while moist and damp earth is permitted to accumulate thereon, causing the parts to rust bad] y,causin g a weakening of the parts, and lessening their durability. In cases where these teeth-guards are formed by depressing portions of the frame-bars an amount of elasticity was given to the frame, and where such frame is subjected to great strain the yielding parts under it give the teeth a vibratory motion highly prejudicial to effective and steady work. This form of harrow also has the toothclip attached to the depressed portions of the bars, and is also liable to be injured by wet and rust.

My improvement avoids these objectionable features and accomplishes other desirable results. Several forms of construction embodying the same are illustrated in the accompanyingdrawings, and the invention is disclosed in the following description and claims.

In the drawings, Figure 1 is a perspective view of a harrow embodying one form of my improvement. Fig. 2 is an enlarged perspective view of a portion of a barrow-frame, showing the different forms of tooth-guard at different points of the harrow. Fig. 2 shows a modified form of tooth-guard. Fig. 3 is a sectional view of a tooth-guard, showing the toothclip beneath the frame with the guard beneath it. Figs. 4, 5, and 6 are perspective views of modified forms of the constructions shown in Fig. 2. Fig. 7 is a like View of a tooth of additional length and curvature with a guard therefor. Fig. 8 isa like view of a construction analogous to thatshown in Fig. 4, in which the clip and its supportingbars are made in one piece.

It is well understood that the tooth-guards perform the two functions of maintaining the body of the frame at such at an elevation as to promote the clearance of the harrow through the spaces between the teeth beneath the frame, and also to protect the teeth and guide or cause clods or sods orother obstructions to be moved away from the central portion of the guards and from the teeth. In one form of myinvention. as shown in Fig. 2, I construct the frame of straight bars and form the guards by attaching guard-pieces to the under side of this frame. These guards are preferably made of two short pieces of metal, d-d, each attached to one of the intersecting bars on each side of the point of intersection,and bent downwardly to form the guard, and attached to each other at the point of their intersection. The one of these short pieces which is attached to the under bar at the point of intersection is prefer ably placed above the other short piece attached to the upper bar.

The toothclip F is attached to the bars A and B at their point of intersection. As at the rear edge of the harrow in constructing the guard one side of the short pieces d extending from the other piece upward to the frame is removed, the lower part of the piece being attached to the centerof the'other piece,

d, forminga triangular guard, as shown at the left of Fig. 2. In constructing the guard where the ends of two bars, A and B, meet, as at the outer sides of the harrow, the guard is formed of two pieces, (1 d, of little more than half the length of those employed in the construction first described, the lower portions of the same being rigidly connected, as is also shown in said figure, or one of said pieces at is bent upward and then inward, having the end attached to the bars at the point of intersection, as shown in Fig. 2. The spring-teeth are attached to the points of intersection of the bars vA and Bin any preferred manner. Instead of attaching the clip to the top of the bars, as shown in Fig. 2, it may be attached beneath the bars, as shown in Fig. 3, in which position the clip as well as the bowed portion of the tooth is protected from wear and injury by contact with the earth by the guard. This construction can be readily attached to an 5 ordinary straight-bar harrow-frame at little cost.

In Figs. 4, 5, and 6 the guard is formed by depressed portions of the bars A and B, and the clip F is supported upon two short pieces IO or bars, d d, extending across the depression or pocket. These bars d are secured to the bars A and B on each side of the pocket in any desired manner, and the clip is secured to them at the point of intersection in the is same way that the clips are attached to the draft and cross bars. \Vhere one of the bars A or B terminates with the pocket one of the bars d terminates at the outer side of the clip, as shown in Fig. 5. In the cases where both the bars terminate with the pocket the bars (1 d terminate at the outside of the clip, and

a post, d connects the bars (1 d with the bars A and B at the center of the pocket.

It has sometimes been proposed to extend the upper end of the spring-tooth and pass it beneath the clip before securing it therein, as shown in Fig. 7, to secure greater elasticity. This has heretofore been found impracticable,

as a portion of the spring would then extend 0 below the frame and would be subject to greater wear than any other portion of the frame, and would soon become weakened at that point and liable to be bent or broken in consequence. This feature of construction can be employed with either of the constructions just described, as shown in Fig. 7. The guard in this instance serves to protect the portion of the spring below the plane of the frame from all injurious wear. \Vhenever corrugated or grooved bars are employed for the frame of the harrow the bars (1 d can be correspondingly grooved to fit them.

Vhen desired the bars d can be cast together in the form of a spider and the clip attached thereto; or, if preferred, the clip and the bars can all be cast in one piece. This construction is shown in Fig. 8, in which the clip is cast with arms d d and the latter attached to the bars A and B in the same manner as the bars (1' (1.

By the constructions shown it will be seen that I provide the harrow with the requisite clearing-spaces, with guards to protect the teeth and also raise the teeth-attaching means out 55 ofdanger of contact with the earth,thns avoiding rust and consequent injury to these parts. I also provide a construction whereby an ironframe harrow of ordinary construction can be provided with clearance spaces and guards for its teeth.

Other results are accomplished by my constructions, as herein stated.

\Vhat I claim, and desire to secure by Let ters Patent, is

1. In aspring-tooth harrow, a tooth-guard which extends below the plane of the main portion of the frame, rigid at its lower portion, and having an opening within in the vertical line of the clip and below the same, substan' stantially as described.

2. A spring-tooth harrow provided with parts which extend below the main body of the frame, forming pockets rigid at their lower portion, open within in the vertical line of the clip and below the same, the side walls ofsaid 7 pockets forming guards for the teeth, and the upper walls forminga seat for the clip, substantially as described.

3. A springtooth harrow provided with hollow pockets which extend downwardly below the toothclips, the walls/of which are rigid and form guards for the teeth, said pockets having binders extending across them, forming a seat for the tooth-clips, substantially as described.

4. A harrow provided with tooth-guards consisting of downwardly extending parts forming more or less complete pockets projecting below the main portion of the harrowframe, the said harrow having bars crossing said pockets, forming binders for the walls of the same, and tooth-clips secured to the inside upper wall of said pockets, substantially as described.

The combination, with a harrow-frame provided with downwardly-extending parts forming more or less complete pockets projecting downwardly from the frame and constituting tooth-guards,of bars extending across the upper portion of said pockets, connecting and securing the walls of the same, tooth-clips secured to said bars, and springteeth, the upper portions of which extend into said pockets and are secured in said clips, whereby the pockets or guards are made to protect the porlo 5 tion of the teeth which lie within the same, substantially as described.

6. The combination, with a harrow-frame, of pockets projecting below the main body of the frame, open below the clip, which act as no tootlrguards, and a tooth-clip provided with attaching portions extending laterally from said clip, substantially as described.

7. A tooth-clip provided with two or more horizontally-disposed arms, whereby the same 1 [5 may be secured to the frame-bars of a harrowfranic above depressed portions of the same, substantially as described.

8. A spring-tooth harrow having a tooth a portion of which between the clip and its 1 20 highest point extends below the clip and the planeof the main portion of the harrow-frame, the lower part of said portion being protected by a guard or shoe, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

\VABREN M. BRINKERHOFF.

Witnesses:

O. H. WHITAKER, CHAS. B. QUICK. 

